The extra low 12 V power supply is provided by a safety transformer installed separately from the fan. For duct applicationWall and ceiling mountingPractical front cover clip-on systemTear-proof power cable systemButterfly shutter to prevent the return of smoke or odours, supplied. Drain hole Ø80 mm. Adapter ring for drain holes Ø100 mm and Ø120 mm, supplied. Made of shockproof and heat resistant ABS plastic. Induction motor – Insulation class F – 2100 Rpm with self lubricating bushes. Overheat motor protection with thermal fuse. 2 particle filter, supplied. According to the CEI 64-8 part 7 (IEC 364-7) regulation, it can be installed in the security area 1, where the electric shock risk is higher. SAFETY TRANSFORMER:Safety transformer included in the box must be installed outside of the zones 0, 1, 2. PRIM. 230V – SEC. 12V c. a. 50Hz – 60VA – CI. Is. F(EN 60742)